1 files changed, 53 insertions, 0 deletions
diff --git a/tunnel/build.gradle b/tunnel/build.gradle
index e1742f4c..6cca87b1 100644
--- a/tunnel/build.gradle
+++ b/tunnel/build.gradle
@@ -1,5 +1,12 @@
+buildscript {
+    dependencies {
+        classpath "com.google.protobuf:protobuf-gradle-plugin:$protobufGradleVersion"
+    }
+}
+
 plugins {
     id 'com.android.library'
+    id 'com.google.protobuf' version "$protobufGradleVersion"
 }
 
 version wireguardVersionName
@@ -54,8 +61,54 @@ android {
 dependencies {
     implementation "androidx.annotation:annotation:$annotationsVersion"
     implementation "androidx.collection:collection:$collectionVersion"
+    implementation "io.grpc:grpc-okhttp:$grpcVersion"
+    implementation "io.grpc:grpc-protobuf-lite:$grpcVersion"
+    implementation "io.grpc:grpc-stub:$grpcVersion"
     compileOnly "com.google.code.findbugs:jsr305:$jsr305Version"
+    compileOnly "javax.annotation:javax.annotation-api:1.2"
     testImplementation "junit:junit:$junitVersion"
 }
 
+protobuf {
+    protoc {
+        // You still need protoc like in the non-Android case
+        artifact = "com.google.protobuf:protoc:$protocVersion"
+    }
+    plugins {
+        grpc {
+            artifact = "io.grpc:protoc-gen-grpc-java:$grpcVersion"
+        }
+    }
+    generateProtoTasks {
+        all().each { task ->
+            task.builtins {
+                java {
+                    option 'lite'
+                }
+            }
+            task.plugins {
+                grpc {
+                    option 'lite'
+                }
+            }
+        }
+    }
+}
+
+afterEvaluate({ project ->
+    // All custom configurations created by the protobuf plugin,
+    // are only available at this point.
+    def protoc = configurations.getByName('protobufToolsLocator_protoc')
+
+    task copyProtoc(type: Copy) {
+        // Used by tunnel/tools/libwg-go/Makefile run in tools/CMakeLists.txt
+        from protoc
+        into "${gradle.gradleUserHomeDir}/caches/protoc-${protocVersion}"
+        rename 'protoc-.*', 'protoc'
+        fileMode 0775
+    }
+
+    preBuild.dependsOn copyProtoc
+})
+
 apply from: "publish.gradle"